Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 24 for “"biotic and abiotic stress"”.
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A Molecular Genetic and Physiological Comparison of the Hybrid Necrosis Response in Wheat (Triticum Aestivum L.) to Biotic and Abiotic Stress Responses
… expression of dominant complementary genes Ne1 and Ne2, located to chromosomes 5B and 2B in a hybrid results the production of necrotic leaf tissue, stunted plant growth, and reduced grain yield, which are similar plant responses to many biotic and abiotic stresses. This study was undertaken to …
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Genotypic and phenotypic characterization of an almond germplasm collection for biotic and abiotic stress [Caratterizzazione genotipica e fenotipica di una collezione di germoplasma di mandorle per lo stress biotico e abiotico]
Il mandorlo (Prunus dulcis (Miller) DA Webb, sin. P. amygdalus Batsch) è una delle specie di frutta secca più coltivata al mondo; il seme e i suoi prodotti derivati sono ampiamente consumati e apprezzati. P. dulcis è caratterizzato da una grande biodiversità e le specie locali rappresentano …
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Investigation of cytochrome P450s in the biosynthesis of rice phytoalexins
… metabolites known as phytoalexins in response to biotic and abiotic stress factors. The rice phytoalexins almost invariably belong to the labdane-related diterpenoid (LRD) superfamily. The phytoalexins identified in rice thus far are momilactones A-E, phytocassanes A-F, oryzalides A and B, …
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Ein molekularer Mechanismus des „Primings” in Arabidopsis thaliana
In plants and animals acquired immunity to biotic and abiotic stress is associated with priming of cells for faster and stronger activation of defense responses. It has been hypothesized that cell priming involves accumulation of latent signaling components that are inactive until challenge …
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Elucidation of Jasmonate-Responsive Promoter Elements in the Calmodulin-Like Gene CML39 in Arabidopsis
All organisms require rapid and flexible signaling mechanisms in order to effectively respond to biotic and abiotic stress. Calcium ions (Ca2+) have proven to be important components of signaling networks. Observations of stimulus-specific oscillations of cytosolic Ca2+ during signal transduction …
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Comparative Analysis of Rhizosphere and Endosphere Microbiome of Different Blueberry Species (Vaccinium sp.)
… Due to its health benefits, there is a huge demand globally, thus expanding the industry. Breeding programs are essential to maintain such industries. Challenges that play a role in contemporary breeding programs are various biotic and abiotic stress factors. Studies have shown that …
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Unlocking the genetic diversity of the undomesticated rice relative Oryza longistaminata
… food supply. Meeting projected increases in demand, which are rising fastest in sub-Saharan Africa, while using resources efficiently and adapting to a changing climate will require new sources of variation for trait improvement. The genetically diverse undomesticated African rice, Oryza …
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Molecular mechanisms of stress tolerance in plants
Environmental stress conditions such as drought, salt stress and pathogenic fungi affect negatively plant growth and productivity. Therefore, it is necessary to search for new genetic components and strategies for improving resistance and tolerance in crops. In the present thesis, we describe two …
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An integrative approach for germplasm utilization, genetic diversity and QTL mapping in Camelina spp. and crop-production issues in Thlaspi arvense, new promising oilseed crops for bioenergy and industrial uses
<p>Fuel demands continue to increase to satisfy current energy needs. Fossil fuels are the primary source of energy and supply 80% of the total demand, 58% of which is used for transportation purposes. However, decreasing oil reserves, rising prices and negative environmental implications have all …
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Terpene analysis and transcript profiling of the conifer response to Heterobasidion annosum s.l. infection and Hylobius abietis feeding
… life, conifers are attacked by fungal pathogens and insects. In the European forests, Heterobasidion annosum sensu stricto (s.s.) attacks Scots pine (Pinus sylvestris) roots, whereas Heterobasidion parviporum causes the majority of decay in Norway spruce (Picea abies), both causing severe …
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Investigations on the role of mitogen-activated protein kinases 11 and 17 in defense response of Arabidopsis thaliana
Priming of defense for a stronger and faster response to abiotic and biotic stress is an important part of acquired immunity in plants and animals. Recent findings revealed the involvement of the two mitogen-activated protein kinases MPK3 and MPK6 in the regulation of priming in Arabidopsis …
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The role of SENSITIVE TO FREEZING6 in plant tolerance to stress
… subject to increasing extremes of enviro nmental stress. Rapid population increases in developing countries also demand higher yield from crop production, often from sub-optimal agricultural areas. Genetic engineering can help meet these needs through the development of crops with greater stress …
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Regulation of Gene Expression by Non-coding RNAs in Arabidopsis and Brachypodium
… sequencing technology has increased our understanding in the importance of pervasive transcription and the resulting indispensable molecules, noncoding RNAs (ncRNAs). A significant effort has been made in determining the biological relevance of ncRNAs, including the small RNAs (smRNAs) and long …
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Investigations into the molecular evolution of plant terpene, alkaloid, and urushiol biosynthetic enzymes
… or to impart our food with different tastes and scents. These chemicals are produced by various pathways of enzyme-mediated reactions in plant cells. It is suspected that enzymes in plant specialized metabolism evolved from those in primary metabolism. Understanding how plants evolved to …
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Identification, Characterization, and Functional Analysis of Terpenoid Specialized Metabolism in Switchgrass (Panicum virgatum) and Carrot (Daucus carota)
… compounds that aid in their reproduction and protection against biotic and abiotic stress. In this work I investigated the metabolism and function of terpenes, the largest class of specialized metabolites, in switchgrass and carrot. Switchgrass (Panicum virgatum L.), a perennial C4 grass …
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A proteomic approach to investigate the response of tef (Eragrostis tef) to drought
… known as tef, is an important staple food and forage crop indigenous to Ethiopia. Tef plants are highly adaptable to abiotic stress conditions and are able to grow and produce grain yields under a wide range of environmental conditions, particularly under drought stress. In this study, tef …
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Dissecting the Transcriptional Regulatory Network Underlying Plant Wound Suberin Biosynthesis
… each year. Wounding during mechanical harvesting and post-harvest handling results in tuber desiccation and provides an entry point for pathogens. Poor wound healing is the major cause of these losses. Wound tissue in potato tubers and all higher plants is comprised of a large proportion of …
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Stress adaptions of the resurrection fern Anemia caffrorum's microbiome and metabolism across seasons
… dry season they are desiccation tolerant (DT) and can survive losing more than 95% of their cellular water content. Its rhizome on the other hand is tolerant all year round and likely regulates the tolerance of the fronds. As such, it provides a unique model to contrast desiccation sensitivity …
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Stress adaptions of the resurrection fern Anemia caffrorum's microbiome and metabolism across seasons
… dry season they are desiccation tolerant (DT) and can survive losing more than 95% of their cellular water content. Its rhizome on the other hand is tolerant all year round and likely regulates the tolerance of the fronds. As such, it provides a unique model to contrast desiccation sensitivity …
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Structural and functional characterization of a Xanthomonas Type III effector
… gene avrRxo1 is conserved in diverse Xoc strains and its homologues have been identified from several other gram-negative bacteria species such as Burkholderia and Acidovorax. In this research, we studied the protein structure of AvrRxo1 and illustrated its virulence mechanism.We determined the …
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